<!--
 * @Descripttion: 表格选择器组件
 * @version: 1.3
 * @Author: sakuya
 * @Date: 2021年6月10日10:04:07
 * @LastEditors: Xujianchen
 * @LastEditTime: 2023-03-18 13:12:15
-->

<template>
  <el-select ref="select" v-model="defaultValue" :size="size" :clearable="clearable" :multiple="multiple" :collapse-tags="collapseTags" :collapse-tags-tooltip="collapseTagsTooltip" :filterable="filterable" :placeholder="placeholder" :disabled="disabled" :filter-method="filterMethod" @remove-tag="removeTag" @visible-change="visibleChange" @clear="clear">
    <template #empty>
      <div v-loading="loading" class="sc-table-select__table" :style="{ width: tableWidth + 'px' }">
        <div class="sc-table-select__header">
          <slot name="header" :form="formData" :submit="formSubmit"></slot>
        </div>
        <el-table ref="table" :data="tableData" :height="245" :highlight-current-row="!multiple" @row-click="click" @select="select" @select-all="selectAll">
          <el-table-column v-if="multiple" type="selection" width="45"></el-table-column>
          <el-table-column v-else type="index" width="45">
            <template #default="scope"
              ><span>{{ scope.$index + (currentPage - 1) * pageSize + 1 }}</span></template
            >
          </el-table-column>
          <slot></slot>
        </el-table>
        <div class="sc-table-select__page">
          <el-pagination v-model:currentPage="currentPage" small background layout="prev, pager, next" :total="total" :page-size="pageSize" @current-change="reload"></el-pagination>
        </div>
      </div>
    </template>
  </el-select>
</template>

<script>
import config from '@/config/tableSelect'

export default {
  props: {
    modelValue: null,
    apiObj: { type: Object, default: () => {} },
    params: { type: Object, default: () => {} },
    placeholder: { type: String, default: '请选择' },
    size: { type: String, default: 'default' },
    clearable: { type: Boolean, default: false },
    multiple: { type: Boolean, default: false },
    filterable: { type: Boolean, default: false },
    collapseTags: { type: Boolean, default: false },
    collapseTagsTooltip: { type: Boolean, default: false },
    disabled: { type: Boolean, default: false },
    tableWidth: { type: Number, default: 400 },
    mode: { type: String, default: 'popover' },
    props: { type: Object, default: () => {} },
  },
  data() {
    return {
      loading: false,
      keyword: null,
      defaultValue: [],
      tableData: [],
      pageSize: config.pageSize,
      total: 0,
      currentPage: 1,
      defaultProps: {
        label: config.props.label,
        value: config.props.value,
        page: config.request.page,
        pageSize: config.request.pageSize,
        keyword: config.request.keyword,
      },
      formData: {},
    }
  },
  computed: {},
  watch: {
    modelValue: {
      handler() {
        this.defaultValue = this.modelValue
        this.autoCurrentLabel()
      },
      deep: true,
    },
  },
  mounted() {
    this.defaultProps = Object.assign(this.defaultProps, this.props)
    this.defaultValue = this.modelValue
    this.autoCurrentLabel()
  },
  methods: {
    //表格显示隐藏回调
    visibleChange(visible) {
      if (visible) {
        this.currentPage = 1
        this.keyword = null
        this.formData = {}
        this.getData()
      } else {
        this.autoCurrentLabel()
      }
    },
    //获取表格数据
    async getData() {
      this.loading = true
      var reqData = {
        [this.defaultProps.page]: this.currentPage,
        [this.defaultProps.pageSize]: this.pageSize,
        [this.defaultProps.keyword]: this.keyword,
      }
      Object.assign(reqData, this.params, this.formData)
      var res = await this.apiObj.get(reqData)
      var parseData = config.parseData(res)
      this.tableData = parseData.rows
      this.total = parseData.total
      this.loading = false
      //表格默认赋值
      this.$nextTick(() => {
        if (this.multiple) {
          this.defaultValue.forEach((row) => {
            var setrow = this.tableData.filter((item) => item[this.defaultProps.value] === row[this.defaultProps.value])
            if (setrow.length > 0) {
              this.$refs.table.toggleRowSelection(setrow[0], true)
            }
          })
        } else {
          var setrow = this.tableData.filter((item) => item[this.defaultProps.value] === this.defaultValue[this.defaultProps.value])
          this.$refs.table.setCurrentRow(setrow[0])
        }
        this.$refs.table.setScrollTop(0)
      })
    },
    //插糟表单提交
    formSubmit() {
      this.currentPage = 1
      this.keyword = null
      this.getData()
    },
    //分页刷新表格
    reload() {
      this.getData()
    },
    //自动模拟options赋值
    autoCurrentLabel() {
      this.$nextTick(() => {
        if (this.multiple) {
          this.$refs.select.selected.forEach((item) => {
            item.currentLabel = item.value[this.defaultProps.label]
          })
        } else {
          this.$refs.select.selectedLabel = this.defaultValue[this.defaultProps.label]
        }
      })
    },
    //表格勾选事件
    select(rows, row) {
      var isSelect = rows.length && rows.indexOf(row) !== -1
      if (isSelect) {
        this.defaultValue.push(row)
      } else {
        this.defaultValue.splice(
          this.defaultValue.findIndex((item) => item[this.defaultProps.value] === row[this.defaultProps.value]),
          1
        )
      }
      this.autoCurrentLabel()
      this.$emit('update:modelValue', this.defaultValue)
      this.$emit('change', this.defaultValue)
    },
    //表格全选事件
    selectAll(rows) {
      var isAllSelect = rows.length > 0
      if (isAllSelect) {
        rows.forEach((row) => {
          var isHas = this.defaultValue.find((item) => item[this.defaultProps.value] === row[this.defaultProps.value])
          if (!isHas) {
            this.defaultValue.push(row)
          }
        })
      } else {
        this.tableData.forEach((row) => {
          var isHas = this.defaultValue.find((item) => item[this.defaultProps.value] === row[this.defaultProps.value])
          if (isHas) {
            this.defaultValue.splice(
              this.defaultValue.findIndex((item) => item[this.defaultProps.value] === row[this.defaultProps.value]),
              1
            )
          }
        })
      }
      this.autoCurrentLabel()
      this.$emit('update:modelValue', this.defaultValue)
      this.$emit('change', this.defaultValue)
    },
    click(row) {
      if (this.multiple) {
        //处理多选点击行
      } else {
        this.defaultValue = row
        this.$refs.select.blur()
        this.autoCurrentLabel()
        this.$emit('update:modelValue', this.defaultValue)
        this.$emit('change', this.defaultValue)
      }
    },
    //tags删除后回调
    removeTag(tag) {
      var row = this.findRowByKey(tag[this.defaultProps.value])
      this.$refs.table.toggleRowSelection(row, false)
      this.$emit('update:modelValue', this.defaultValue)
    },
    //清空后的回调
    clear() {
      this.$emit('update:modelValue', this.defaultValue)
    },
    // 关键值查询表格数据行
    findRowByKey(value) {
      return this.tableData.find((item) => item[this.defaultProps.value] === value)
    },
    filterMethod(keyword) {
      if (!keyword) {
        this.keyword = null
        return false
      }
      this.keyword = keyword
      this.getData()
    },
    // 触发select隐藏
    blur() {
      this.$refs.select.blur()
    },
    // 触发select显示
    focus() {
      this.$refs.select.focus()
    },
  },
}
</script>

<style scoped>
.sc-table-select__table {
  padding: 12px;
}

.sc-table-select__page {
  padding-top: 12px;
}
</style>
